Drilling-machine.



J. S. BARNES & J. R. VINGBR.

DRILLING MACHINE.

APPLICATION FILED APR.2'I, 1909.

Patented May 17, 1910.

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APPLIOATION FILED APR. 27, 1909.

Patented May 17, 1910.

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J. S. BARNES & J. R. VINOER.

DRILLING MACHINE.

APPLICATION FILED APB.27, 1909.

Patented May 17, 1910.

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J. S. BARNES & J. R. VINOER.

DRILLING MACHINE.

APPLICATION FILED APR. 27, 1909.

5 SHEETS-SHEET 4.

Patented May 17, 1910.

J. S. BARNES & J. R. VINOER.

DRILLING. MACHINE.

APPLIGJXTIOII FILED APE.27, 1909.

98,60%. Patented May 17, 1910.

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' UNITED STATES PATENT OFFICE.

JOHN S. BARNES AND JOHN R. VINCER, OF ROCKFORD, ILLINOIS, ASSIGNORS CPOW. F. &

JOHN BARNES COMPANY, OF ROCKFORD, ILLINOIS.

DRILLING-MACHINE Specification of Letters Patent.

Application filed April 27, 1909. Serial No. 492,592.

To all whom it may concern:

Be it known that we, JonN S. BAnNns and J 011 R. Vmcnn, citizens of theUnited States, residing at Rockford, in the county of Winnebago andState of lllinois, have invented certain new and useful Improvements inDrilling-Machines, of which thefollowing is a specification.

The ob'ect of this invention is to impart to the drill spindle a quickadvance movement to the work, a slow movement in the same directionwhile the drill is doing its work, and a quick return movement of thedrill spindle to its starting position.

' 1n the accompanyiiig drawings, Figure l is a side elevation of adrilling machine tov which our improvements have been applied.

Fig. 2 is a vertical section through the operative parts. Fig. 3 is avertical section on dotted line a. a Fig. 2. Fig. t is a front faceelevation. Fig. 5 is a vertical section on dotted line b b Fig. 1. Fig.6 is a vertical section on dotted line (1 Fig. 1'. Fig. 7 is a verticalsection in line with the cross shaft. Fig. 8 is a vertical section ondotted line d d Fig. 7. Fig. 9 is a vertical section on dotted line a cFig. 7. Fig. 10 is a vertical section on dotted linej f Fig. 7. Fig. 11is a vertical section on dotted line Fig. 1. Fig:

12 is a vertical section on dotted line It h Fig. 1. Fig. 13 is adevelopment view of the trip cam. Fig. 14 is a development of the quickapproach and slow feed cam. Fig. 15 is a development. of the quickreturn cam. Figs. 16 and 17 are detail views illustrating the manner inwhich the stud 116 is operated by the studs 105 and 106.

The main frame of the drilling machine is of a well known type to whichwe have applied our improvements. This frame comprises the section 1 ofa vertical column, from the forward upper portion of which projects abearing 2 for a sleeve 3 of a drill spindle 4 located in a bearing 5.This sleeve 3 has a toothed rack 6 forming a part thereof. A bevel gear7 has the usual spliued connection with the drill spindle tby which thespindle'is rotated and permitted a ver tical reciprocation. Two bearingsS are formed as a support for the shaft 9, said shaft being rotated by abelt connection with the cone pulley 10. A hcvcl pinion 11 has a fixedconnection with the shaft 9 and meshes with the bevel gear 7 throughwhich a rotary movement is imparted to the drill spindle. v

A cross shaft 12 is supported in the main frame adjacent to the sleeve 3and base. spur pinion 13 connected to it which meshes with v the toothedrack 6. To'this cross shaft 12 is fixedly connected a wheel 14 which isformed with openings in its face in which a lever may be inserted,andby'which the wheel and cross shaft connected therewith a re rotated.The rotations of this cross shaft will raise and lower the sleeve 3carrying the drill spindle 4 with it, andour improvements have to dowith the raising and lowering of the drill'spindle in the process ofdrilling. i

From the main frame around the cross shaft. extends a hub 15, and aroundthis hub is located a collar 16 which supports. a selatented May 1'7,$1910.

ries of spring friction devices 17, which bear against. the periphery ofthe hub and are located in tubular projections 18. From this collarextends an car 19 which is provided with a diagonally arranged slot 20.Around this hub 15 is located a worm Wheel 21 provided with a ratchetface 22.

To the cross shaft 12 is splined a combined spur pinion 23 andsawtoothed ratchet 24. The face of. the saw-toothed ratchet 24 is formedwith a ratchet 25 which is fitted to contact with the ratchet 22 form-.ing a part ofthe worm wheel 21. From the spur pinion 23 extends a hub 26having its end provided with an annular groove 27 The end of the crossshaft 12 is formed with screw-threads 28, and a cap 29 is turned inconnection with this screw threaded end and supports two screws30'which'project into the annular groove 27. A spiral spring 31surrounds the hub 26, one end rests in contact with the spur pinion 23and its other end in contact with the inner end of'the cap 25), theaction of the spring being to hold the clutch faces 22 and 25 yleldinglyin contact. 3y turning the cap 29 inward, the screws 30 will contactwith the main portion of the lmb 26 when the clutch faces 22 and 25 willbe seated firmly in. contact, and by withdra wing the cap the hub 26carrying the which is secured a dog 32 which is adapted to engage theteeth of the ratchet 24. To the other end of this rod 31 is secured anarm 33 from which extends a stud 34 located in the slot of the collar16.

. ing connection is formed between the worm wheel 21 and the crossshaft, and through the cross shaft 12 to the drill spindle, in adownward direction. 1Vhen the worm wheel 21 is rotated in the oppositedirection the rod 31 will be rocked and the dog will be moved intoengagement with the ratchet 24 which will form a connection between theworm wheel and ratchet, and through the ratchet with the cross shaft 12which will raise the drill spindle.

\Vhen it is desirable to move the drill spindle by hand, the connectionbetween the worm wheel 21 and the cross shaft 12 must be broken, this isaccomplished by turning the cap 29 sufiiciently to withdraw the clutchsection from engagement with the clutch section 22,

The frame for supporting the mechanism for imparting quick advance, slowfeed and quick return to the drill spindle is connected to the hub 15 bythe collar 35, and a collar 36 held in connection with the stud 37, andfrom these collars extend the various branches 38, 39, 40, 41 and 42supporting the various bearings for the shafts.

At the junction of the branches 41 and 42 is located a verticallyarranged bearing '43 within which is located a shaft 44 to the upper endof which is secured a bevel pinion 45 and to the lower end a bevelpinion 46. A horizontally arranged shaft 47 has a bevel pinion 48connected to one end, and to its other end is secured the plate with theconcentric toothed rings 47-}. The bevel pinion 48 meshes with the bevelpinion 45. A shaft 49 is supported in suitable bearings and supports atoothed wheel 50 capable of being moved into mesh with either ,of thetoothed rings 474;. This shaft 49 has a positive drive connection withthe shaft 9 through the gears 51 in any suitable manner to vary thespeed of the shaft 49 with respect to the shaft 9. This construction ofvariable speed gearing between the shaft 9 and theishaft 44 is not new,but is herein shown in order that a complete chain may be had betweenthe shafts, it being understood that other variable speed gearing can beused if deemed best. This shaft 44 is to impart the slow r work feed tothe drill spindle and its speed may be varied above stated to meet thedifferent conditions of work.

A shaft 52 is supported in bearings 53 and 54 in a manner to revolvetherein. To this shaft is fixedly connected a cam 55 for moving theclutch for the quick return of the drill spindle. A cam 56 is alsofixedly connected to this shaft and is employed to move the clutches forthe quick advance and work feed movements imparted to the drill spindle.

To the shaft 52 is secured a friction wheel 57 around which is placed aband 58 having its ends connected by the spring devices 59. A spiralgear 60 is loosely mounted on the shaft 52 and is connected to the band58 by the stud 61- as shown at Fig. 2. As the spiral gear 60 iscontinually rotating, the band 58 will be carried with it, which willtend to rotate the friction wheel 57 and the shaft 52 to which it isfixedly connected, but as the shaft 52 is held at rest most of the timethe friction will slip.

A shaft 62 is held in bearings 63 and 64 in a manner to be rotated.Loosely mounted on this shaft 62 are two spur pinions 65 and 66 that areheld against longitudinal displacement by collars 65 and 66 secured tothe shaft. The spur pinion 65 has a projection 67 forming one-half of aclutch, and

the spur pinion 66 has a stud 68 forming half of a clutch.

A clutch section 69 has a sliding engagei .groove of the cam 55.

A double clutch section 77 has a sliding connection with the shaft 62 ina manner to be rotated by the shaft, and is formed with an annulargroove 78 within which are located studs 79 extendin from a shippinlever 80 pivoted to a bearing 81 for the sha 75, said studs havin shoes,79 arranged in the groove 78. e upper end of the shipping lever 80supports a ball 82 WlllCll is located in the groove of the cam 56. Oneface of this clutch section 77 has a stud 83 extending therefrom whichin connection with the stud 67 extending from the spur pinion 65 forms adriving connection between the shaft 62 and said pinion. The other faceof this clutch section 77 is formed with saw-teeth 84, forming one halfof a clutch.

On the shaft 62 is loosely mounted a bevel gear 85 which meshes with thebevel pinion 46 secured to the shaft 44. This bevel gear forming adriving connection between the bevel gear and the shaft 62.

A worm 87 has a fixed connection with the shaft 62 and meshes with theworm wheel 21, and to the forward end of the shaft 62 is connected acrank 88. p

To the shaft 75 are fixedly connected two spur gears 89 and 90, also aspiralpinion 91. The spur gear 90 meshes with an intermediate spurpinion 92 which in turn meshes with the spur gear 66 located on theshaft 62. The spur gear 89 meshes with the spur gear mounted on theshaft 62.

A shaft'93 is supported in bearings 94, and to its lower end is secureda spiral pinion 95 which meshes with the spiral pinion 91 secured to theshaft 75.

A spiral pinion 96 is secured to the upper end of the shaft 93 andmeshes with the. spiral gear 60 mounted on the shaft' 52.

The rear end of the shaft is supported in a bracket 97 connected to themain frame, a pulley 98 is secured to this shaft and is rotated by abelt connection with the counter shaft of the drilling machine.

In a bearing 99 is supported a stud 100 on which is rotatably mounted adrum 101 having its periphery formed with teeth 102 which mesh with thespur pinion 23. The drum is formed with two concentric undercut grooves103 and 104 within which are adjustably held studs 105 and 106 respec-'tively.

To the branch 40 is connected a stud 107 upon which'is pivoted an arm108. The up per end of this arm supports a spring actuated plunger 109having its head projected sufiiciently to be engaged by. a lever 110pivoted top the frame and formed with a notch 111 having wedge shapedfaces of sufiicient bevel to properly withdraw the plunger. In orderthat this lever 110 may be held out of operative position, a springactuated stud 112 is carried thereby which enters a notch 113 in theframe. To the arm 108 is pivoted a shifting rod 114 which extendsforward and is guided in an eye formed in the. end of the stud 100 uponwhich the drum 101 is mounted. A knob 115 is connected to the free endof the rod 114 by which the rod may be moved. To the rod 114'between thestud 100 and the knob 115 is adjustably connected a stud 116 havinginclined faces.

To the shaft 52 is fixedly connected a trip cam or stop wheel 117 thedevelopment of which is shown in Fig. 13. The face of this cam is formedwith an irregular shaped groove and with stops arranged along the pathof the groove.

The stop 118 is adjustably connected to the trip cam and is locatedwithin the groove of the cam. Stops 119, 120 and 121 are fixed portionsor offsets in the cam'groove. The

plunger 109 'is intended to enter the groove of the trip cam and to beengaged by the various stops during the rotation of the trip cam.

By reference to 13, 14 and 15 which are developments of the three cams55, 56

and 117 fixedly connected to the shaft 52, the various positions of theplunger 109 and the balls 7 6 and 82 during the rotations of the camscan be seen. Figs. 14 and 15 are sections through the balls 82 and 76respectively and Fig. 13, is a section through the plunger 109, and theposition of the trip cam shown at Fig. 13 is' shifted so as to bring theplunger and balls in the same plane so the movements can be betterunderstood. It is understood that all the cams move in unison and at alltimesinthe same direction, but such rotary movements are i-ntermittentas the trip cam determines the time of movement of the other two cams,and the cam 56 moves the clutches for the quick advance and slow feedmovement of the drill. spindle and the cam 55 is for moving theclutchfor the quick return movement of the drill spindle. In these figures thepositions of the plunger andballs are changed while in practice they donot change but the cams revolve.

In starting the mechanism, the rod 114 is moved inward which will movethe arm 108 and move the plunger 109 free of the adjustable stop 118which will permit the trip cam to revolve until the stop 119 engages theplunger. 'The same extent of movement of the cam 56 will cause the cam56 to move the roller along the incline of said cam into the positionshown at 122, which will move the stud 83 into engagement with the stud67, thereby forming a driving connection between the shaft 62 and theshaft 75, which through its connection with the drill spindle beforedescribed will cause the spindle to descend rapidly until the stud v106contacts with the stud 116, thereby moving the rod 114 and the plunger109 so that the plunger will move free of the stop 119 and release thetrip cam for further partial rotary move ment until the stop 120contacts with the plunger 109. As'the cam 56 is again free to rotate,the ball thereof will be moved from the position shown at 122 into theposition shown at 123, which movement will break the driving connectionbetween the studs 6.7 and 83 and form a driving connection between theclutch faces 84 and 86 thereby forming a driving connection between theshaft 9 through the various gears that. will effect a Work feed to, theshaft 62. When the stop 120 contacts with the plunger 109 and the tripcam is at rest, the ball '82 will occu y the position shown at 124.While the .c utch faces. 84 and 86 are in en agement, the drillspindle'will'be moved downward slowly through its connection with theshaft 9 until the drilling operation is completed when the stud 105 willcontact with the stud 116 and move the plunger 109 free of the stop 120thereby allowing the trip cam to rotate until the stop 121 engages theplunger. The cam 56 will move the ball from the position indicated by124 into the position 125', which will move the clutch face 84 free ofthe clutch face 86 thereby breaking the connection between the shaft 9and the drill spindle. The ball 82 will occupy the position shown at 126when the plunger 109 contacts with the stop 121.

During the movements of the cam 56 above described until the ball 82assumes the position at 125, the cam 55 will have partially rotateduntil its ball 76 is in the position shown at 127, which will hold thestud 70 of the section 69 free of the stud 68 of the spur gear 66, andthe only movements remaining are those required to quickly return thedrill spindle to its starting position, and allow the mechanism to cometo rest. This is accomplished by moving the stud 70 into and out ofengagement with the stud 68. While the trip cam 1s moving along theplunger from the posifrom the tion shown at 128 until the stop 121engages it, the cam 55 is moving along the ball 76 from the position127, to the position 129. The cam 55 in making this movement will movethe clutch section 69 carrying itsstud 70 into engagement with the stud68, thereby formmg a driving connection between the shafts and 62, andas the spur-gear 66 revolves in a direction opposite/to the spur gear65, the drill spindle will be raised until the stud 105 contacts withthe stud 116 and moves the plunger 109 free of the stop 121 of the tripcam which will liberate the trip cam and permit it to move until the sto118 engages it and holds it at rest which will be in its startingposition. While the trip cam is making its last movement, the cam 55will make the same extent of rotation which will travel along the ball76 0 position 129 into its starting positlon, and this movement willwithdraw the stud 70 from engagement with the stud 68 thereby breakingthe connection between the shafts 75 and 62 when all the cams will be intheir initial positions, and these opera tions can be repeated by movingthe rod 114 inward to release the trip cam. By turning the stop 118 intothe position shown in ,dotted lines Fig. 13, after one cycle ofmovements of drill spindle have been completed they will be repeatedindefinitely. When the stop 120 is in contact with the plunger, thedrill spindle descendin slowly during the drilling rocess, am? may bereturned before it as reached its predetercause the mined depth. This isaccqzlfilished by moving the lever 110 which notch 111 to receive theplunger 109 inside the head thereof, thereby withdrawing the plungerfrom engagement with the stop 120 and permitting the cams 55, 56 and 117to rotate until the peripheral enlargement 130 contacts with theprojection 131 extending from the lever 110 when the lever will beraised free of the plunger thereby allowing the plunger to enter thegroove of the cam 117 and the further rotary movement of the cam 117will bring the stop 121 against the plunger after which the regularquick return movement is imparted to the drill spindle. By adjusting thestuds 105 and 106 in their respective grooves in the drum 101 the lengthof movement of the drill spindle under the quick advance and work feedmay be varied.

We claim as our invention. 1

.1. In a drilling machine, the combinatlon of a rotatably andlongitudinally movable drill spindle, a cross shaft for the spindle, asecond shaft, ear connection between the second shaft an cross shaft, adriving shaft, a cam shaft, gear connection between the second shaft anddriving shaft, friction connection between the driving shaft and camshaft, clutches mounted on the second shaft, cams mounted on thecamshaft, and connections between the clutches and cams.

2. In a drilling machine, the combination of a rotatably andlongitudinally movable drill spindle, a cross shaft for the splndle, asecond shaft, gear connection between this second shaft and cross shaft,a driving shaft, a cam shaft, gear connection between the second shaftand driving shaft, friction connection between the driving shaft and camshaft, means for releasing the cam shaft to permit its movement,clutches mounted on the second shaft, cams mounted on the cam shaft andconnections between the clutches and cams. 3. In a drilling machine, thecombination of a rotatably and longitudinally movable drill spindle, across shaft for the spindle, a second shaft, ear connection between thesecond shaft an cross shaft, a driving shaft, a cam shaft, gearconnection between the second shaft and driving shaft, frictionconnection between the driving shaft and cam shaft, means for holdingthe cam shaft against rotation, means for releasing the shaft to permitits movement, clutches mounted on the second shaft, cams mounted on thecam shaft, and connections between the clutches and cams. v

4. The combination with a rotatable and longitudinally movable toolspindle, of means for effecting its longitudinal movement, including adriven member, a driving member, means for connecting the driving memberto and disconnecting it from the driven member,- a rotary element forgoverning the position of said connecting means, and mechanism forautomatically effecting an intermittent rotation of the rotary element.

5. The combination with a rotatable and longitudinally movable toolspindle, of means for efi'ectin its longitudinal movement. including arivenmember, a driving member, means for connecting the driving memberto and disconnecting it from the driven member, and automatic mechanismcontrolled by the longitudinal movement of said spindle for positivelyoperatin said means to connect and disconnect the di'iving and drivenmembers.

6. The combination with a rotatable and longitudinally movable toolspindle, of means for eifeetin its longitudinal movement, including ariven member, a driving member, a clutch for connecting anddisconnecting the members, and automatic mechanism controlled by the lonitudinal movement of said spindle for'p'ositlvely operating the clutch.

7 The combination with a rotatable and longitudinall movable toolspindle, of means for e ect'in its longitudinal movement, including ariven member, a driving member, a clutch for eOnnecting anddisconnecting the members, a rotary clutchshifting member, and automaticmeans for intermittently holding said member a ainst rotation to preventthe shifting o? the clutch.

S. The combination with a rotatable and longitudinally movable toolspindle, of means for efi'ectin its longitudinal movement, including aiven member, a driving member, a clutch, for connecting anddisconnecting the members, a rotary shifting cam, and means forintermittently and automatically rotating said camto effect the shiftingof the clutch.

9. The combination with a rotatable and longitudinally movable tool 5indle, of means for e ectin its longitudinal movement, including a ivenmember, a driving member, a clutch for connecting and disconnecting themembers, a rotary shifting cam, rotating means therefor constantlyoperating thereon to rotate said cam, and means for intermittently andautomatically holding said cam a ainst rotation.

10. The combinatiph with a rotatable and longitudinally movable toolspindle, of mechanism for efi'ectin its longitudinal movement, includinga riven member connected to the spindle, a driving member, a clutch forconnecting and disconnecting the membersfautomatic clutch-shiftingmechanism,

means for operating the same, and mechan ism controlled by the operationof the driven member for governingthe operation of the clutch-shiftingmechanism by its operating means.

11. The combination with a rotatable and longitudinal'movable toolspindle, of mechanism for effecting its longitudinal movement, includinga driven member connected to the spindle, a driving member, a clutch forconnecting and disconnecting the driven and driving members, automaticclutchshifting mechanism. continuously operated means for driving theclutch-shifting mechanism, and mechanism controlled by the operation ofthe driven member for automatically controlling the operation of saidshifting mechanism by its driving means.

12. The combination with a rotatable and longitudinally movable toolspindle, of mechanism for effecting its longitudinal movement, includinga driven member connected to the spindle, a driving member, a clutch forconnecting and disconnecting the members, automatic clutch-shiftingmechanism, continuously operated means for driving the clutch-shiftingmechanism, and mechanism controlled by the operation of the drivenmember for effecting an ntermittent' operation of the clutch -sh1ft1ngmechanism by the continuously operate drivin means.

1?). he combination with a rotatable and longitudinally movable toolsplndle, of mechanism for effecting its longitudinal movement, includina driven member connected to the spind e, a driving member, a clutch forconnecting and disconnecting the members, automatic clutch-shiftingmechanism, continuously operated drivin means for the clutch-shiftingmechanism avlng a sli connection therewith, and a stop movab e into andout of coaction with the clut chshifting mechanism to control itsmovement by the driving means.

14. The combination with a rotatable and longitudinally movable toolspindle of mechanism for efi'ectin its longitudinal movement, includin ariven member connected to the spind e, a driving member, a clutch forconnecting and disconnecting the members, automatic clutch-shiftingmechanism, continuously operated driving means for the clutch-shiftingmechanism havm a slip connection therewith, a stop1 mova 1e into and outof coaction with t e clutchshiftin mechanism to control its movement bythe riving means, and means for operating the stop.

15. The combination with a rotatable and lon 'tudinally movable toolspindle of mec anism for eifecti its lon 'tudinal movement, includin ariven mem er connected to the spind e, a driving member, a clutch forconnecting and disconnectin the members,,aut0matic clutch-shifting manism, eontinuousl -operated driving means for the clutch-shiftingmechanism aving) a slip connection therewith, a sto mova 19 into and outof coaction with t e clutchshifting mechanism to control its movement bythe driving means, manual means for effecting an initial movement of thestop, and automatic means for effecting after movements thereof.

16. The combination with a rotatable and longitudinally movable toolspindle, of mechanism for longitudinally moving the same, including adriven member connected to the tool spindle, a driving member, a clutchfor connecting and disconnecting the members, rotatable clutch shiftingmechanism, driving means for the clutch shifting mechanism, a devicerotatable with the clutch-shifting mechanism and having a series of stopshoulders, a stop movable into engagement with the different shouldersto hold the clutch shifting mechanism against movement, and means formoving the stop out of such engagement.

17 The combination with a rotatable and longitudinally movable toolspindle, of mechanism for longitudinally moving the same, including adriven member connected to the tool spindle, a driving member, a clutchfor connecting and disconnecting the members, a shaft, a clutch-shiftingcam mounted on the shaft, means for driving the shaft, a stop wheelmounted on the shaft and having a series of stop shoulders, and ashift-.

able stop movable into and out of engagement with the shoulders to holdthe shaft and clutch-shifting cam in different positions.

18. The combination with a rotatable and longitudinally movable toolspindle, of a feed shaft geared thereto, a driving shaft geared to thefeed shaft, a driving member mounted on the driving shaft and having aclutch portion, a clutch mounted on said driving shaft and movable intoand out of engagement with said clutch portion, another shaft, a camfixed to the other shaft, a swinging clutch-shifting arm engaged withthe cam and with the clutch member, driving means for the second shafthaving a slip connection therewith, a stop wheel mounted on said secondshaft and having a plurality of stop shoulders, and a swinging armhaving a stop that moves into and out of engagement with the differentshoulders to hold the cam in different positions and thus maintain theclutch in and out of coaction operated by the driven member for shiftingthe stop.

21. The combination with a rotatable and longitudinally movable .toolspindle, of mechanism for longitudinally moving the same, including adriven member, a driving member, a clutch for connecting anddisconnecting the members, rotary clutch shifting mechanism, drivingmeans for the clutch-shifting mechanism, a device rotata- I ble with theclutch-shifting mechanism and having a series of stop shoulders, a stopmovable into and out of engagement with the difiierent shoulders to holdthe clutchshifting mechanism in different positions, and means rotatablewith the driven member for effecting the shifting movement of the stop.

22. The combination with a rotatable and longitudinally movable toolspindle, of mechanism for longitudinally moving the same, including adriven member, a driving member, a clutch for connecting anddisconnecting the members, rotary clutch-shifting mechanism, drivingmeans for the clutchshifting mechanism, a device rotatable with theclutch-shifting mechanism and having a series of stop shoulders, a stopmovable into and out of engagement with the different shoulders to holdthe, clutch-shifting mechanism in different positions, a rotary devicegeared to the driven member, and elements adjustably mounted on the saiddevice and engaging the stop for moving the same out of engagement withthe shoulders.

23. The combination with a rotatable and longitudinally movable toolspindle, of a feed shaft geared thereto, a driven shaft geared to thefeed shaft, a driving member rotatable on the driven shaft, a clutch forconnect ng and disconnecting the driving member with the driven shaft, acountershaft, means for rotating the countershaft having a slipconnection therewith, a cam fixed to the countershaft, a swinging clutchshifting device engaging with the cam, a rotatable stop wheel fixed tothe countershaft and having a plurality of stop shoulders, a swingingholding stop movable into and out of engagement with thedifi'erent'shoulders, an actuating device connected thereto, a rotatablestop shifting member cared to the feed shaft, and actuating studsadjustably mounted on the rotatable member and e11- gagin the actuatingdevice for the stop to shift t 10 same.

24. The combination with a rotatable and longitudinally movable toolspindle, of means for eil'eeting its longitudinal movement, including adriven member, two driv-' ment, including a driven member, two driv-'ing members therefor, a single clutch for separately connecting eitherdriving member to the driven member, a clutch shifter,

a rotary shifting cam for operating the shifter to carry the clutchsuccessively inlo coaction with different driving members and automaticmeans controlled by the operation of the driven mcn'iber forintermittently rolaling the shifting cam.

26. The combination with a rotatable and longitudinally movable toolspindle, of means for effectin its longitudinal movement, including adriven member, two driving members therefor, a single clutch forseparately connecting either driving member to the driven member, aclutch shifter, a rotary shiftinccam for operating the shifter to movethe clutch, automatic means for rotating the cam, and automatic meansfor intermittently preventing the rotation of said cam by its rotatingmeans to govern the shifting of the clutch.

27. The combination with rotatable and longitudinally movable toolspindle, of

means for longitudinally moving the same,

including a driven member connected to the s indlc, two driving members,a sin le 0 utch for separatel connecting either drivin member to theriven member, a cam for shifting the clutch into engagement with eitherdriving member and to an intermediate position, and automatic means forintermittently movin the cam to positions to move the clutch an maintainit in engagement with the different driving'members and out of engaement with both.

28. The combination with a rotatable and lon itudinally movable tool sindle, of a feed shaft geared thereto, a riven shaft eared to the'feedshaft, two drivin oosely journaled upon the driven s aft, a

clutch member operating between the gears and movable into and out ofengagement with both, a countershaft, a cam fixed to the countershaft, aswinging clutch-shifter engaged with the clutch member and with the cam,said cam being rotatable to posigears tions to, engage the clutch memberwith both driving gears and move it out of en gagement with both,driving means for the countershaft having a slip connection therewith, astop wheel fixed to the countershaft, a stop coactin with the wheel tohold the eountershaft in different positions, and means for moving saidstop.

25). The combination with a rotatable and longitudinally movable toolspindle, of mechanism for effecting its longitudinal movement, includinga driven member connected thereto, two driving members, two clutchesrespectively connecting and disconnecting the driving members and thedriven member, common means for positively shifting the clutches, andautomatic means controlled by the operation of the driven memher forcontrolling the operation of said shifting means.

30. The combination with a rotatable and longitudinally movable toolspindle, of IIltKlNllllHm for eifectin its longitudinal movement,including a di'iven member connected thereto, two driving members, twoclutches respectively connecting and disconnecting the driving membersand the driven member, and synchronously rotatable devices for shiftingthe clutches.

31. The combination with a rotatable and longitudinally movable toolspindle, of mechanism for effecting its longitudinal movement, includinga driven member connected thereto, two driving members, two clutchesrespectively connecting and disconnecting the driving members and thedriven member, and separate cams for shifting the clutches.

32. The combination with a rotatable and longitudinally movable toolspindle of mechanism for effectin its longitu inal movement, including ariven member connected thereto, two driving members, two clutchesrespectively connecting and disconnccting the driving members and thedriven member, a shaft, se arate cams fixed to the shaft, and devices 5ifted by the cams and shifting clutches.

33. The combination witha rotatable and lon itudinall movable toolspindle of mec anism or efiectin its lon itudinal movement, including ariven mem er connected thereto, two driving members, two clutchesrespectively connecting and disconnecting the driving and drivenmembers, a shaft, separate cams fixed to the shaft, devices shifted bythe cams and shifting the clutches, driving means having a slipconnection with the'shaft, a sto wheel and a shiftable stop cooperatingwith the wheel, for overning the rotation of the shaft by the drivingmeans.

34. The combination with a rotatable and lon 'itudinall movable toolspindle, of medhanism or effecting its longitudinal movement, includinga driven member connected thereto, two driving members, two clutchesrespectively connecting and disconnecting the driving and drivenmembers, a shaft, separate cams fixed to the shaft, driving means havinga slip connection with the shaft, a stop wheel having a channel, and aseries of shoulders located in the channel, a shiftable stop cooperatingwith the shoulders for governing the rotation of the shaft by thedriving means, manual means for effecting an initial movement of thestop, and automatic means for effecting subsequent movements of saidstop.

35. The combination with a rotatable and longitudinally movable toolspindle, of a feed shaft geared thereto, a driven shaft geared to thefeed shaft, uick and work feed mechanisms, includin driving gearsjournaled on the driven shaft, a clutch shiftable into and out ofengagement with both driving gears, a quick return mechanism including adriving gear journaled on the driven shaft, a clutch for connecting anddisconnecting the latter driving gear with said shaft, clutch shiftingdevices, a countershaft, cams fixed to the countershaft and engaged withsaid shifting devices, said cams on their rotation effecting successivemovements of the clutch-shifting devices and consequently of theclutches, driving means for the countershaft having a slip connectiontherewith, a stop wheel mounted on the countershaft and having aplurality of shoulders, a swinging stop movable into witnesses.

JOHN S. BARNES.

.JOHN R. VINCER. WVitnesses:

A. W. BARNES, A. O. BEHEL.

